Metal-casting machine.



I J. 3. THOMPSON.

METAL CASTINGIMACHI'NE.

' APPLICATION Fi LED Aue. H. 1911.

la li' Patented Jan. 14, 1919,

JOHN S. THOMIPSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO THOMPSON TYPEMACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

METAL-CASTING MACHINE.

To all whom it may concern:

Beit known that I, JOHN'S. THOMPSON, a citizen of the United States,residing at Chicage, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Metal-Casting Machines, of whichthe following is a full, clear, concise, and exact description,reference being had to the accompanying drawing, forming a part of thisspecification.

My invention relates to metal-casting machines, and has to do moreparticularly with so-called typerasting'machines which will produce, bymeans of a series of separate castings fused together, continuous stripsof material for use in the printing art, such, for instance. as leads,rules, and the like. These rules, leads, etc., are usually thin,ribbon-like structures, being cast in various thicknesses, sometimes asthin as .028 of an inch. Hitherto, in molding machines of this kind areciprocatory ejector blade has been provided for ejecting the sectionsof the caststrip so as to clear the n'iold-cavity for the next injectionof molten metal. A moving ejector of this character is objectionable,whether thin or otherwise, and is particularly objectionable Where thinstrips of lead, .028 of an inch, are cast. Such an ejector blade musthave a very snug lit to begin with, and its fit must be so maintained inorder to prevent themolten metal from running in between the ejectorblade and the surrounding supports in which it slides.

One of the objects of my invention is to obviate the use of the ejectorblade, and instead I provide a mold-block having a mold cavity, movableacross the face of the molten metal inlet, the transverse cross-sectionof which is preferably the same as the t'ans-' verse cross-section ofthe strip, and so shaped that an edge of the mold-cavity advances thelast section of the strip upon each reciprocation of the mold-block,means being provided to hold the strip during the return moven'ient ofthe mold bloclr to clear 7 together with the strip-holdmg means, actsMetal the mold-cavity for the next injection of molten metal. Thus,the'mold-block itself Specification of Letters Patent; Patented J 141919, Application filed August 11, 1917.

Serial No. 185,737.

)an in drawin s in which various modifications of my invention are shownand inwlnch- Figure 1 is a longitudinal. transverse section of one formof my invention;

Fig. 2 is a transverse section along the line 2-2 of Fig. 1;

Fig. 3 is another form of my invention;

Fig. 4 is a transverse line of Fig. 3;

Fig. 5 is another form of my invent-ion;

Fig. 6 is a transverse section along the line 6-6 of Fig. 5;

Fig. 7 is still another form of my invention; and

Fig. 8 is transverse section along the line 8-8 of Fig. 7.

Referring now more particularly to the form of my invention as shown inFigs. 1 and 2, it comprises a mold-block 1- supported between guides 2and 3, there being section along the relative reciprocatory movementbetween connected to the mold-block 1 and adapted to be connected toabell-crank of some sort so as toreciprocate the mold-block 1. Abox-l1ke mold-cavity 5 is'provided 1n the mold-block 1, the transversecross-section of which is preferably the same as the trans versecross-section of the strip 6 which is being cast. This cavity 5 is openat its outer end and is provided with an inner edge 7, this inner "edgeacting to advance the strip as the mold-block is reciprocated. Toprevent the strip 6 from returning upon each. return movement of themold-block 1, I pro'- vide a stripper la in the shape of a springiingeror yieldingly-held checlepawl.

For the purpose of feeding the molten metal, I provide a metal pot 8 ofany wellknown construction, and for this purpose a pot may be used suchas is shown in my Patent No. 1,029,243 of June 11, 1912, entitled pot;for type-casting machines, and

patent is so arranged that the small metal feedingport 9 therein isautomatically opened and closed to allow the molten metal. to fill thecavity 5 and the jet 11, Where such a. jet is, used. c This constructionis well known and therefore I will not attem t to describe in detail theoperation thereo the like. The metal pot shown in this i In the form ofmy invention .shown in Figs. 1 and 2, the block 3 is provided with ajet-opening 11 which increases to the width of the cavity 5 as shown in'Fig. 2. The member 12, which acts as a wall for one side of thejet-opening 11, has a vertical reciprocatory movement so as to permitthe jet to be advanced with the strip 6. This member 12 is, of course,moved out of the way just before the mold-block 1 starts to advance.This construction is also well known and therefore I will not describeherein any particular mechanism required forthis purpose, but willsimply state that it'is only necessary that the portion 12 be droppedout of the way of the jet 10 before the strip 6 is advanced, and afterthe last-cast portion of the strip 6 has been advanced and before thenext portion of molten metal is injected,

the block 12 is again moved upwardly into *place. A suitable arrangementfor performmg this operation is shown in a pending application SerialNo. 128,3&2, for casting machines.

In Fig. 2, which is a transverse section along the line 22 of Fig. 1,the jet-opening 11 is shown in the side of the block 3, the jet-openingbeing so shaped as to permit a ready flow of molten metal to themoldcavity The movable member 12 is shown in dotted lines in thisfigure, the view'being taken along line 2-2, which is back of the block12.

Each reciprocation of the mold-block 1 brings the edge 7 of themold-cavity 5 march- I cally on a line with the right-hand edge of thejet-opening 11 (Fig. 1) so that upon the tion I have referred to aribbon-like strip.

as being cast, but it will be apparent that my invention may be employedin making strips of transverse cross-section other than ribbon-like.

Figs. 3 and 4.

In Figs. 3 and 4 another form of my invention isshovvn, in'which thejet-opening carrying-block 3fis movable with and thus forms part of themold-block 1, instead of being stationary as in Fig. 1. The member 12,

" however, is vertically movable sojas to allow the jets 10 to beadvanced with the strip 6.

It is thought the operation of the form shown in Figs. 3 and 4; will bereadily understood in view of the description of Figs. 1 and 2.

' Figs. 5 and b.

In Figs. 5 and 6 another modified form of my invention is shown, inwhich the nozzle of the metal pot 8 is positioned close to themold-cavity in the mold-block 1, so that a continuous strip 6 is formedwithout any projecting jets 10. In this case the stationary block 3 alsoacts as a guide for the moldblock 1, which is adapted to be reciprocatedas in the forms already described. In this form the metal feeding-port 9is placed so that the metal is fed directly to the moldcavity withoutthe intervention of a j ct-opening. As the strip 6 is idvanced thestripper or pawl l-l prevents the return movement thereof.

Figs. nd 8.

In the form shown in Figs. 7 and 8 the strip 6 is cast lying in ahorizontal position, as distinguishin from the vertical position of theforms already described. In the present form the molten metal isinjected from an edge side of the strip. The nozzle of the metal pot isalso preferably positioned immediately adjacent the edge'of the strip,so that no projecting jet is cast.

It is thought the operation of the form shown in Figs. 7 and 8 will beapparent in view of the description already given of the other forms.

For the purpose of illustrating my invention, I'have shown a mold forcasting strips of ribbon-like structure, but it will be apparent that myinvention is not by any means limited to this shape. of strip, and

' that the crosssectional shape may be varied and determined by theshape of the cavity in the mold :block. I also aim to apply my inventionin other ways than that shown, and appreciate that many changes andmodifications will readily occur to those skilled in the art, andtherefore I do not desire to be limited to the structure shown anddescribed, but im to cover all that which comes within the spirit andscope of the appended claims.

I claim as new and desire to secure by Letters Patent of the UnitedStates:

l. A machine for casting strips of metal comprising a metalfeeding-inlct, a moldblock having a mold-cavity arranged to have aportionof the strip casting always remain therein movable across theface of the inlet, means for imparting relative rcciprocatory movementto the inlet and mold-block, said mold cavity being shaped to advancethe strip upon'each reciprocation, and means for holding the stripduring the return movement of reciprocation to clear the cavity.

2. A machine' for casting strips of metal comprising a metalfeeding-inlet, a mold-., block having a mold-cavity movable across orcheck-pawl for holding the strip against reciprocation. A

4. A machine for castingstrips of metalcomprising a metal feeding-inlet,a mold block having a mold-cavity movable transversely of the face ofthe inlet, a stripper or.

check-pawl, and means for reciprocating the mold-block whereby an edgeof the moldcavity effects an intermittent advance of the strip. Y r

5. A machinefor casting strips of metal comprising a metalfeeding-inlet, a reciprocatory mold-block having a mold-cavity movableacross the face of the inlet, means whereby upon each reciprocation ofthe mold-block the metal in the mold is advanced to clear the cavity andmeans engaging and holding the strip against retraction.

6. A machine for casting strips of metal comprising a block having ajet-opening, a mold-block having a mold-cavity movable across the faceof the jet-opening, means for feeding molten metal to the jet-opening,means for imparting relative reciprocatory movement to the blocks, saidmold-cavity bcing shaped to advance the strip upon each reciprocation,and gripping means for holding the strip-during the return movement ofthe mold-block to clear the cavity.

7. A machine for casting strips of metal comprising a block having ajet-opening, a mold-block having a mold-cavity in crosssection similarto the transverse cross-section of the strip and movable across the faceof the jet-opening, means for feeding molten metal'to the jet-opening,means for imparting a relative rcciprocatory movement to the thetransverse cross-section blocks whereby LlPOIl each reciprocation themetal in the mold-cavity is advanced to clear the cavity, and grippingmeans for holding the strip during the return movement of themold-block.

8. A machine for casting strips of metal comprising ablock having ajet-opening, a reciprocatory mold-block having a moldcavity movableacross the face of the jetopening, and means whereby upon eachreciprocation of the mold the metal therein .is advanced to clear themold-cavity and leave the strip in position to be fused by the nextcast.

9. A machine for casting strips of metal comprising 'a block having ajet-opening, a reciprocatory mold-block having a moldcavity in one sidein cross-section similar to of the strip and movable across the face ofthe jet-opening means for feeding molten metal to the jet opening, andmeans .Whereby upon each .reciprocation of the mold the metal therein isadvanced to clear the moldccavity and leave the strip in next cast.

10. A machine for casting strips of metal comprising a block having a jet-outlet in one face thereof, a mold-block having a moldcavityextending back from a face of the mold-block movable against the face ofthe block, means for feeding molten metal to the jet-outlet, and meansfor imparting a reciprocatory movement to the mold-block so as to movethe mold-cavity across the jet-outlet whereby an edge of the mold-cavityacts to advance the strip upon each reciprocation, and means for holdingthe strip in its advanced position to be fused by the next cast.

11. A machine for casting strips of metal comprising ablock having ametal feedingoutlet, a reciprocatory mold-block having a mold-cavitymovable transverse of the outposition'to be fused by the

